PortAudio: paex_read_write_wire.c Source File

PortAudio 2.0

- Main Page
- Related Pages
- Modules
- Data Structures
- Files

- File List
- Globals

paex_read_write_wire.c
Go to the documentation of this file.
1
8 /*
9 * $Id: patest_read_record.c 757 2004-02-13 07:48:10Z rossbencina $
10 *
11 * This program uses the PortAudio Portable Audio Library.
12 * For more information see: http://www.portaudio.com
13 * Copyright (c) 1999-2000 Ross Bencina and Phil Burk
14 *
15 * Permission is hereby granted, free of charge, to any person obtaining
16 * a copy of this software and associated documentation files
17 * (the "Software"), to deal in the Software without restriction,
18 * including without limitation the rights to use, copy, modify, merge,
19 * publish, distribute, sublicense, and/or sell copies of the Software,
20 * and to permit persons to whom the Software is furnished to do so,
21 * subject to the following conditions:
22 *
23 * The above copyright notice and this permission notice shall be
24 * included in all copies or substantial portions of the Software.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
29 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
30 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
31 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
32 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
33 */
34
35 /*
36 * The text above constitutes the entire PortAudio license; however,
37 * the PortAudio community also makes the following non-binding requests:
38 *
39 * Any person wishing to distribute modifications to the Software is
40 * requested to send the modifications to the original developer so that
41 * they can be incorporated into the canonical version. It is also
42 * requested that these non-binding requests be included along with the
43 * license above.
44 */
45
46 #include <stdio.h>
47 #include <stdlib.h>
48 #include <string.h>
49 #include "portaudio.h"
50
51 /* #define SAMPLE_RATE (17932) // Test failure to open with this value. */
52 #define SAMPLE_RATE (44100)
53 #define FRAMES_PER_BUFFER (1024)
54 #define NUM_CHANNELS (2)
55 #define NUM_SECONDS (15)
56 /* #define DITHER_FLAG (paDitherOff) */
57 #define DITHER_FLAG (0)
58
59 /* @todo Underflow and overflow is disabled until we fix priming of blocking write. */
60 #define CHECK_OVERFLOW (0)
61 #define CHECK_UNDERFLOW (0)
62
63
64 /* Select sample format. */
65 #if 0
66 #define PA_SAMPLE_TYPE paFloat32
67 #define SAMPLE_SIZE (4)
68 #define SAMPLE_SILENCE (0.0f)
69 #define CLEAR(a) memset( (a), 0, FRAMES_PER_BUFFER * NUM_CHANNELS * SAMPLE_SIZE )
70 #define PRINTF_S_FORMAT "%.8f"
71 #elif 0
72 #define PA_SAMPLE_TYPE paInt16
73 #define SAMPLE_SIZE (2)
74 #define SAMPLE_SILENCE (0)
75 #define CLEAR(a) memset( (a), 0, FRAMES_PER_BUFFER * NUM_CHANNELS * SAMPLE_SIZE )
76 #define PRINTF_S_FORMAT "%d"
77 #elif 1
78 #define PA_SAMPLE_TYPE paInt24
79 #define SAMPLE_SIZE (3)
80 #define SAMPLE_SILENCE (0)
81 #define CLEAR(a) memset( (a), 0, FRAMES_PER_BUFFER * NUM_CHANNELS * SAMPLE_SIZE )
82 #define PRINTF_S_FORMAT "%d"
83 #elif 0
84 #define PA_SAMPLE_TYPE paInt8
85 #define SAMPLE_SIZE (1)
86 #define SAMPLE_SILENCE (0)
87 #define CLEAR(a) memset( (a), 0, FRAMES_PER_BUFFER * NUM_CHANNELS * SAMPLE_SIZE )
88 #define PRINTF_S_FORMAT "%d"
89 #else
90 #define PA_SAMPLE_TYPE paUInt8
91 #define SAMPLE_SIZE (1)
92 #define SAMPLE_SILENCE (128)
93 #define CLEAR( a ) { \
94 int i; \
95 for( i=0; i<FRAMES_PER_BUFFER*NUM_CHANNELS; i++ ) \
96 ((unsigned char *)a)[i] = (SAMPLE_SILENCE); \
97 }
98 #define PRINTF_S_FORMAT "%d"
99 #endif
100
101
102 /*******************************************************************/
103 int main(void);
104 int main(void)
105 {
106 PaStreamParameters inputParameters, outputParameters;
107 PaStream *stream = NULL;
108 PaError err;
109 char *sampleBlock;
110 int i;
111 int numBytes;
112
113
114 printf("patest_read_write_wire.c\n"); fflush(stdout);
115
116 numBytes = FRAMES_PER_BUFFER * NUM_CHANNELS * SAMPLE_SIZE ;
117 sampleBlock = (char *) malloc( numBytes );
118 if( sampleBlock == NULL )
119 {
120 printf("Could not allocate record array.\n");
121 exit(1);
122 }
123 CLEAR( sampleBlock );
124
125 err = Pa_Initialize();
126 if( err != paNoError ) goto error;
127
128 inputParameters.device = Pa_GetDefaultInputDevice(); /* default input device */
129 printf( "Input device # %d.\n", inputParameters.device );
130 printf( "Input LL: %g s\n", Pa_GetDeviceInfo( inputParameters.device )->defaultLowInputLatency );
131 printf( "Input HL: %g s\n", Pa_GetDeviceInfo( inputParameters.device )->defaultHighInputLatency );
132 inputParameters.channelCount = NUM_CHANNELS;
133 inputParameters.sampleFormat = PA_SAMPLE_TYPE;
134 inputParameters.suggestedLatency = Pa_GetDeviceInfo( inputParameters.device )->defaultHighInputLatency ;
135 inputParameters.hostApiSpecificStreamInfo = NULL;
136
137 outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
138 printf( "Output device # %d.\n", outputParameters.device );
139 printf( "Output LL: %g s\n", Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency );
140 printf( "Output HL: %g s\n", Pa_GetDeviceInfo( outputParameters.device )->defaultHighOutputLatency );
141 outputParameters.channelCount = NUM_CHANNELS;
142 outputParameters.sampleFormat = PA_SAMPLE_TYPE;
143 outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultHighOutputLatency;
144 outputParameters.hostApiSpecificStreamInfo = NULL;
145
146 /* -- setup -- */
147
148 err = Pa_OpenStream(
149 &stream,
150 &inputParameters,
151 &outputParameters,
152 SAMPLE_RATE,
153 FRAMES_PER_BUFFER,
154 paClipOff, /* we won't output out of range samples so don't bother clipping them */
155 NULL, /* no callback, use blocking API */
156 NULL ); /* no callback, so no callback userData */
157 if( err != paNoError ) goto error;
158
159 err = Pa_StartStream( stream );
160 if( err != paNoError ) goto error;
161 printf("Wire on. Will run %d seconds.\n", NUM_SECONDS); fflush(stdout);
162
163 for( i=0; i<(NUM_SECONDS*SAMPLE_RATE)/FRAMES_PER_BUFFER; ++i )
164 {
165 err = Pa_WriteStream( stream, sampleBlock, FRAMES_PER_BUFFER );
166 if( err && CHECK_UNDERFLOW ) goto xrun;
167 err = Pa_ReadStream( stream, sampleBlock, FRAMES_PER_BUFFER );
168 if( err && CHECK_OVERFLOW ) goto xrun;
169 }
170 err = Pa_StopStream( stream );
171 if( err != paNoError ) goto error;
172
173 CLEAR( sampleBlock );
174 /*
175 err = Pa_StartStream( stream );
176 if( err != paNoError ) goto error;
177 printf("Wire on. Interrupt to stop.\n"); fflush(stdout);
178
179 while( 1 )
180 {
181 err = Pa_WriteStream( stream, sampleBlock, FRAMES_PER_BUFFER );
182 if( err ) goto xrun;
183 err = Pa_ReadStream( stream, sampleBlock, FRAMES_PER_BUFFER );
184 if( err ) goto xrun;
185 }
186 err = Pa_StopStream( stream );
187 if( err != paNoError ) goto error;
188
189 Pa_CloseStream( stream );
190 */
191 free( sampleBlock );
192
193 Pa_Terminate();
194 return 0;
195
196 xrun:
197 if( stream ) {
198 Pa_AbortStream( stream );
199 Pa_CloseStream( stream );
200 }
201 free( sampleBlock );
202 Pa_Terminate();
203 if( err & paInputOverflow )
204 fprintf( stderr, "Input Overflow.\n" );
205 if( err & paOutputUnderflow )
206 fprintf( stderr, "Output Underflow.\n" );
207 return -2;
208
209 error:
210 if( stream ) {
211 Pa_AbortStream( stream );
212 Pa_CloseStream( stream );
213 }
214 free( sampleBlock );
215 Pa_Terminate();
216 fprintf( stderr, "An error occured while using the portaudio stream\n" );
217 fprintf( stderr, "Error number: %d\n", err );
218 fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
219 return -1;
220 }
221